选择率的定义：已经转化掉的反应物的物质的量中，转化为目的的产物的摩尔分数。
n. selectance
由选择率 Selection rule
技术选择与利润率 choice of technology and rate of profit; choice of technique and the rate of profit
综合选择率 over-all selectivity
动态频率选择 DFS ; Dynamic Frequency Selection
频率选择表面 FSS ; Frequency selective surface
自动速率选择 ARS ; auto rate selection ; automatic velocity choice
频率选择 Bands ; FREQUENCY SELECT
频率选择性 frequency selectivity
选择频率 Bands ; select frequency ; PARM VALUE
For query processing and optimization, it is one of important issues to estimate query selectivity, and histograms can be an effective tool for accurate query selectivity estimation.
查询选择率的估计是查询处理和优化的重要问题之一。
参考来源 - 基于分布密度的直方图构造和选择率估计·2,447,543篇论文数据，部分数据来源于NoteExpress
直方图用于计算谓词的选择率。
Histograms are used to calculate the selectivity of the predicates.
优化器可以使用数据分布来计算查询中过滤器的选择率。
The optimizer can use data distributions to calculate selectivity for the filters in a query.
本文观点而被视为最好的选择率低的信用卡适合自己的生活方式。
This article discusses the points to be considered while choosing the best low rate credit cards suited to one's lifestyle.
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